I like to run multiple varieties at the same time?

I grow under 1200 watts of 3590 Cree LEDs and the and I like to run multiple varieties at the same time just for shits and giggles. I've never had any trouble with differing stains and it's actually a blessing in disguise be because they finish at different times it gives me the luxury to stretch out my trimming and curing which is far more convenient than chopping them all at once which becomes a lot of work.
Any suggestions on where I can buy beans in twos and threes without paying the premium singles seem to cost.